In 1926, he tied for 2nd-3rd in the Poznan championship and won the Poznan Chess Club Championship. In 1928, he won the Poznan championship for the second time. Wojciechowski represented Poznan at the Polish Team championships in1929 and 1934. He took 16th place in the 3rd Polish Championship at Warsaw 1935 which won by Savielly Tartakower.
Wojciechowski played for Poland on the eighth board scoring +7 –2 =5 in the 3rd unofficial Chess Olympiad at Munich 1936.
He took 11th place in the 4th Polish championship held in Jurata in 1937, again won by Tartakower. All sources say this was the 4th Polish Championship, but looking at the crosstable there were some non-Poles playing. I am not sure how to explain that except that perhaps the title of Polish Champion went to the highest scoring Pole.
For some interesting information on “Frydman” see Edward Winter's article titled Fun concerning Andrew Soltis' book Chess Lists. Also check out Winter's post number 7084.
Wojciechowski is probably best known for his famous combination in a game against Tylkowski at Poznań 1931. For details on this game refer to a discussion on the Ortueta-Sanz Hoax.
Suffering from poverty and poor health, he died of pneumonia at the age of 32.
The final standing at Jurata 1937 were:
1) Tartakower 17.0
3) Najdorf 15.0
4-6) Appel, Pirc and Endre Steiner 14.0
7-8) Szpiro and Regedzinski 12.5
9-10) Gerstenfeld and Foltys 12.0
11) Wojciechowski 11.0
12) Henry Friedman 10.0
13) Erik Andersen Sr. 9.5
14) Kremer 9.0
15-16) Apscheneek and Zawadzki 9.0
17-18) Lowcki 7and Piltz 7.5
19) Schaechter 7.0
20) Achilles Frydman, Achilles 6.5
21) Jagielski 5.5
22) Widermanski 0.5